The only difference is I had a function in fpdf to save the PDF to the users hard drive whereas I don’t have any such function to save a text file to a users hard drive:)
Basically it is for an admin facility so someone who has not got access to phpMyAdmin can save the data that has been submitted to the database to a file that they can then process.
I would have thought this is a really common need as lots of websites write data to the database and there must be some way of those less technical people getting a hold of this data.